The Kang family's mines

The man started. "Our family's mine business has been going on for a very long time, and in that time we have employed many people to mine for us," he said. "We found various different Ore veins that we started mining."

"One of them was the Blood-tainted Lead," the man said. 

"At first, we thought nothing of this ore, as it was not that different from any other. However, slowly it came to light that anyone who spends too long of a time with the ore would die due to the toxicity."

"When the toxicity was first found out, the family stopped mining this ore entirely and moved on to the rest of the ores. However, as time continued, one of our ancestors decided to check the metal that got mined from it and refined it. When the metal formed, he was surprised at the strength the metal had and just how much superior it was to the other metals in those veins."